Ishihara Colour Deficiency Test with 24 Plates. This test can used to test on protan & deutan defects. Patients must identify numbers or patterns formed in a matrix of small coloured dots varying in colour & intensity (pseudo-isochromatic plates). Ideal for commercial/ industrial colour screening.
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Ishihara Colour Deficiency Test
The test consists of a number of colored plates, called Ishihara vision plates, each of which contains a circle of dots appearing randomized in color and size. Within the pattern are dots which form a number or shape clearly visible to those with normal color vision, and invisible, or difficult to see, to those with a red-green color vision defect, or the other way around.
Ishihara test with 24 plates
The 24 plates is the most popular version. The 24-plate version (Abridged) is used principally at factories and offices of transportation and other concered places of the purpose of conducting usual sample survery for color deficiency in a short space of time when hiring new employees.
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